What is authentication? @internet-class
What is authentication?  @internet-class
Uploaded October 2016 | Updated September 2026, 1 hour ago
One of the most common ways to establish your identity online is through the process of authentication. Authentication can and frequently is used for access control—​to ensure that only certain users have access to certain systems or capabilities. But it does this by having users establish their identity in a way that can be retrieve information about them or the roles and capabilities they have on a particular system. So part of our online identity is the sets of username and password combinations we use to access certain sites.

Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo).

Part of the internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
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What is authentication?

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